package com.briup.demo.extend;

import com.briup.demo.Book;
import com.briup.demo.Category;
import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
public class BookExtend extends Book {
    //书籍的类目信息
    private Category category;
@Override
    public String toString() {
        return super.toString() + ":" + category.toString();

    }
}
